Hi all, I have a question.   Let's say I want to have some crafting recipes that either give a different result are simply unavailable depending on a variable. (The question is not how to store/read this variable, but how to hijack the vanilla crafting process.)   Two simple completely arbitrary examples:   1. Standard crafting recipe is 4 sand becomes 1 sandstone. Now I want to check some data stored on the player and if variable A = 3, putting 4 sand into the craf